Automatic fruit sorting production line

Abstract

The application relates to an automatic fruit sorting production line, which comprises a feeding mechanism, a current-crowding fruit mechanism, an empty fruit tray / over-limit fruit removing mechanism, an automatic fruit quality detecting mechanism, an automatic sorting mechanism, a discharging mechanism, an empty fruit tray backflow mechanism, a case-crowding discharging mechanism, an electric control mechanism and a conveying line connected with the above components. The application adopts a free fruit dragging conveying mode to ensure that the fruits are not bumped during conveying, and the quality detection and classification of the fruits are completed through an automatic detection system, and the classification and discharging of the fruits are completed by using the conveying line body; the application not only improves the efficiency and accuracy of fruit quality classification, but also upgrades the fruit production line from manual to automation.

Description

Technical Field

[0001] This invention relates to the field of visual inspection automation equipment technology, and in particular to an automatic fruit sorting production line. Background Technology

[0002] Currently, fruit sorting in the market is divided into manual sorting and automatic testing equipment; manual sorting uses human eyes to judge the quality of fruit; automatic testing equipment tests the surface of fruit.

[0003] However, manual sorting does present several challenges in fruit inspection. First, relying on manual sorting leads to high labor costs, especially in large-scale production environments, requiring substantial labor resources. Second, manual sorting is relatively inefficient and easily affected by human factors such as fatigue and lack of concentration, thus reducing overall production efficiency. More importantly, manual sorting has a significant error rate. Because human vision and judgment can be subjective and inconsistent, it is difficult to guarantee the accuracy and consistency of sorting.

[0004] In contrast, automated inspection equipment has advantages in some aspects, such as improved inspection speed and consistency. However, these devices also have significant limitations. For example, when fruit is fixed relative to the camera, automated inspection equipment typically only inspects the surface of the fruit facing the camera, meaning other surfaces of the fruit may be overlooked, leading to incomplete and inaccurate inspections. This is a significant problem because the quality of fruit depends on more than just the condition of one surface.

[0005] Furthermore, automated inspection equipment can also exhibit significant errors when performing internal inspections. For example, some equipment may fail to accurately identify defects or abnormalities inside the fruit. This could be due to technological limitations or equipment calibration issues.

[0006] Another concern is that fruits may experience impacts during automated inspection. These impacts can cause damage not only to the surface of the fruit, affecting its appearance and quality, but also to its internal structure. This damage may be invisible, but it can shorten the fruit's shelf life and reduce its taste to some extent.

[0007] In conclusion, both manual sorting and existing automated testing equipment present their own problems and challenges in fruit testing. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide an automatic fruit sorting production line, which uses automated detection equipment and conveyor lines and other mechanical structures to complete the grade classification of fruits.

[0009] The technical solution adopted by the present invention to solve its technical problem is: an automatic fruit sorting production line, including a feeding mechanism, a fruit confluence and discharge mechanism, an empty fruit tray / oversized fruit rejection mechanism, an automatic fruit quality detection mechanism, an automatic sorting mechanism, a feeding mechanism, an empty fruit tray return mechanism, a boxing and confluence feeding mechanism, an electrical control mechanism, and a conveyor line connecting the above components.

[0010] The feeding mechanism conveys the fruit trays containing fruit to the fruit collection and discharge mechanism;

[0011] The fruit sorting mechanism sorts the disordered fruit trays and then transfers the sorted individual fruit trays to the empty fruit tray / over-limit fruit removal mechanism.

[0012] The empty fruit tray / oversized fruit rejection mechanism detects empty fruit trays / oversized fruits, rejects them, and transmits non-empty fruit trays / oversized fruits to the automatic fruit quality detection mechanism.

[0013] An automatic fruit quality inspection mechanism includes an external fruit quality inspection device and an internal fruit quality inspection device. The external fruit quality inspection device inspects the entire surface of the fruit; the internal fruit quality inspection device performs non-destructive testing on the inside of the fruit using infrared spectroscopy; the fruit that has passed both external and internal quality inspections is then transported to an automatic sorting mechanism.

[0014] An automatic sorting mechanism, connected to a feeding mechanism, transports the inspected fruits to the corresponding feeding channels.

[0015] The feeding mechanism includes multiple feeding channels of different levels, which are used to manually feed the inspected fruits;

[0016] The empty fruit tray return mechanism is connected to the empty fruit tray / oversized fruit rejection mechanism and the unloading mechanism, respectively, and transmits the empty fruit tray to the loading mechanism;

[0017] The boxing and feeding mechanism is used to box and feed the graded fruits.

[0018] The electrical control mechanism controls the operation of each component through circuitry.

[0019] Furthermore, the fruit external quality inspection device of the present invention includes a clamping and rotating device, a side inspection mechanism, an upper surface inspection mechanism, and a lower surface inspection mechanism; the fruit is placed in a fruit tray and transported to a weighing mechanism by an external inspection conveyor line; the clamping and rotating device lifts and clamps the fruit in the fruit tray and rotates it during horizontal transport; during the rotation, the side inspection mechanism performs 360° side inspection on the fruit; after the upper surface inspection mechanism and the lower surface inspection mechanism perform upper and lower surface inspections on the fruit respectively, the fruit internal quality inspection device performs internal quality inspection on the fruit by near-infrared irradiation.

[0020] Furthermore, the clamping and rotating device of the present invention includes a clamping assembly and a rotating assembly; the clamping assemblies are respectively disposed above and below the conveying flow line; the clamping assembly includes a sprocket rotation assembly and a clamping carrier that is raised and lowered on the sprocket rotation assembly via a guide rail assembly; the clamping carrier disposed below pushes the fruit out of the fruit tray while the clamping carrier disposed above descends and cooperates with the clamping carrier below to clamp and transport the fruit; when passing through the rotating assembly, the rotating assembly drives the clamping carriers above and below to rotate synchronously through friction, realizing the rotation of the clamping carrier during the transmission process.

[0021] Furthermore, the fruit tray of the present invention includes a fruit tray base, a base light-shielding ring disposed within the fruit tray base, and a fruit tray; the fruit tray has a hollow structure, the bottom of the fruit tray is connected to the base light-shielding ring, and the top of the fruit tray is provided with multiple claws along the circumference of the edge, the ends of the claws having a downward curvature.

[0022] Furthermore, the clamping carrier of the present invention includes a rotating shaft bearing seat and a rotating shaft disposed in the rotating shaft bearing seat. The rotating shaft bearing seat is connected to the guide rail assembly through a fixing block. One end of the rotating shaft is provided with a limiting top block. The end of the limiting top block has a concave arc surface.

[0023] Furthermore, the rotating assembly of the present invention includes an upper pulley assembly, an upper rotating belt connected to the upper pulley assembly, a lower pulley assembly, and a lower rotating belt connected to the lower pulley assembly; elastic fixing plates are respectively provided on the inner sides of the upper rotating belt and the lower rotating belt; the upper pulley assembly and the lower pulley assembly are connected to a rotary motor via a synchronous belt; the rotary motor drives the upper rotating belt and the lower rotating belt to rotate synchronously; the upper rotating belt drives the upper rotating shaft to rotate through friction, and the lower rotating belt drives the lower rotating shaft to rotate through friction.

[0024] Furthermore, the fruit internal quality detection device of the present invention includes an internal detection frame, on which an internal detection fruit tray conveyor line, a near-infrared light source module, and a receiving module are arranged; the near-infrared light source module is mounted above the internal detection fruit tray conveyor line, and the near-infrared light source module irradiates the fruit supported by the fruit tray on the internal detection fruit tray conveyor line through the near-infrared light source; the receiving module is located below the internal detection fruit tray conveyor line, and the receiving module is connected to a spectrometer, and the receiving module receives the light scattered or transmitted through the fruit and transmits it to the spectrometer.

[0025] Furthermore, the near-infrared light source module of the present invention includes two sets of light sources, which are respectively set on both sides of the internal detection fruit tray conveyor line through a light source bracket module; the light source is a halogen lamp light source, and a light source shield is provided on the side of the halogen lamp light source, which is rotatably mounted on a shield rotating cylinder.

[0026] Furthermore, the light source support module of the present invention includes a horizontal adjustment component, a vertical adjustment component, and an angle adjustment component; the horizontal adjustment component is disposed on the internal detection frame, the vertical adjustment component moves on the horizontal adjustment component, the angle adjustment component is connected to the vertical adjustment component, and the light source is connected to the angle adjustment component.

[0027] Furthermore, the internal detection fruit tray conveyor line of the present invention includes two sets of belt drive assemblies, with a gap between the two sets of belt drive assemblies, and the two sets of belt drive assemblies support both sides of the fruit tray for transmission; the receiving module includes an optical fiber lens, which is connected to a spectrometer via a circuit; the optical fiber lens is disposed in the gap between the two sets of belt drive assemblies and located below the fruit tray.

[0028] The beneficial effects of this invention are that it solves the defects existing in the prior art, adopts a free fruit trolley conveyor to ensure that the fruit is not bumped during the conveying process, and completes the quality inspection and classification of the fruit through an automatic detection system, and completes the classification and unloading of the fruit through the conveyor line; it not only improves the efficiency and accuracy of fruit quality classification, but also completes the upgrade of the fruit production line from manual to automated. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the production line of the present invention;

[0030] Figure 2 This is a schematic diagram of the automatic fruit quality detection mechanism of the present invention;

[0031] Figure 3 This is an exploded view of the fruit holder structure of the present invention;

[0032] Figure 4 This is a schematic diagram of the clamping and rotating device of the present invention;

[0033] Figure 5 This is a schematic diagram of the structure of the clamping carrier of the present invention;

[0034] Figure 6 This is a schematic diagram of the structure of the rotating component of the present invention;

[0035] Figure 7 This is a schematic diagram of the fruit internal quality detection device of the present invention;

[0036] Figure 8 This is a schematic diagram of the internal quality detection device for fruits from another perspective.

[0037] In the diagram: 1. Feeding mechanism; 2. Fruit discharging mechanism; 3. Empty fruit tray / oversized fruit removal mechanism; 4. Automatic fruit quality detection mechanism; 5. Automatic sorting mechanism; 6. Unloading mechanism; 7. Empty fruit tray return mechanism; 8. Packing and unloading mechanism; 9. Electrical control mechanism; 10. Fruit tray;

[0038] 41. External quality testing device for fruits; 42. Internal quality testing device for fruits;

[0039] 411. Weighing mechanism; 412. Clamping and rotating device; 413. Upper surface detection device; 414. Lower surface detection device; 415. Side detection device; 418. Clamping assembly; 419. Rotating assembly; 420. Drive assembly;

[0040] 4181. Sprocket rotation assembly; 4182. Guide rail assembly; 4183. Clamping carrier; 4184. Shaft bearing seat; 4185. Shaft; 4186. Fixing block; 4187. Limiting top block; 4188. Curved surface; 4191. Upper pulley assembly; 4192. Upper rotating belt; 4193. Lower pulley assembly; 4194. Lower rotating belt; 4195. Elastic fixing plate; 4196. Synchronous belt; 4197. Rotary motor; 4201. Sprocket module;

[0041] 421. Internal inspection frame; 422. Internal inspection fruit tray conveyor line; 423. Near-infrared light source module; 424. Receiving module; 425. Heat sink; 426. Cooling fan; 4221. Belt drive assembly; 4231. Light source; 4232. Light source shield; 4233. Shield rotary cylinder; 4234. Lateral adjustment assembly; 4235. Longitudinal adjustment assembly; 4236. Angle adjustment assembly; 4241. Fiber optic lens;

[0042] 101. Fruit tray base; 102. Base light-shielding ring; 103. Fruit tray; 104. Support claw. Detailed Implementation

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0044] like Figures 1-8 The automatic fruit sorting production line shown includes a feeding mechanism 1, a fruit confluence and discharge mechanism 2, an empty fruit tray / oversized fruit rejection mechanism 3, an automatic fruit quality detection mechanism 4, an automatic sorting mechanism 5, a discharging mechanism 6, an empty fruit tray return mechanism 7, a boxing and confluence discharging mechanism 8, an electrical control mechanism 9, and a conveyor line connecting the above components.

[0045] like Figures 2-6 As shown, the automatic fruit quality detection device 4 includes a weighing mechanism 411, an external fruit quality detection device 41, and an internal fruit quality detection device 42. The external fruit quality detection device includes a clamping and rotating device 412, a side detection mechanism 415, an upper surface detection mechanism 413, and a lower surface detection mechanism 414. Fruit is placed in a fruit tray and transported to the weighing mechanism by an external detection conveyor line. The external detection conveyor line includes two conveyor strips with a gap, which support both sides of the fruit tray for transport. The weighing mechanism includes a dynamic weighing sensor, which is connected to a weighing plate via a connector to weigh the fruit entering the external fruit quality detection device. The clamping and rotating device lifts and clamps the fruit in the fruit tray and rotates it during horizontal transport. During rotation, the side detection mechanism performs a 360° side inspection of the fruit. After the side inspection is completed, the upper and lower surface detection mechanisms inspect the upper and lower surfaces of the fruit, respectively. Finally, the internal fruit quality detection device uses near-infrared irradiation to detect the internal quality of the fruit.

[0046] like Figure 3 As shown, the fruit tray 10 includes a fruit tray base 101, a base light-shielding ring 102 disposed within the fruit tray base 101, and a fruit tray 103. The fruit tray has a hollow structure, which allows for unobstructed views and facilitates image acquisition of the top and bottom of the fruit by the detection components. The bottom of the fruit tray is connected to the base light-shielding ring, and the top of the fruit tray has multiple claws 104 arranged along the circumference of the edge. The ends of the claws have a downward arc, which allows the claws 104 to better fit the bottom of the fruit without damaging it.

[0047] like Figures 4-6As shown, the clamping and rotating device 412 includes a clamping assembly 418, a rotating assembly 419, and a driving assembly 420. The clamping assembly 418 is respectively positioned above and below the fruit tray conveyor. The clamping assembly 419 includes a sprocket rotation assembly 4181 and a clamping carrier 4183 that is raised and lowered on the sprocket rotation assembly via a guide rail assembly 4182. The driving assembly 420 is connected to the sprocket rotation assemblies 4181 positioned above and below via a sprocket module 4201. The clamping carrier 4183 positioned below pushes the fruit out of the fruit tray while the clamping carrier positioned above descends to cooperate with the clamping carrier below in clamping and conveying the fruit. When passing through the rotating assembly 419, the rotating assembly drives the clamping carriers above and below to rotate synchronously through friction, realizing the rotation of the clamping carriers during the conveying process.

[0048] The clamping carrier 4183 includes a rotating shaft bearing seat 4184 and a rotating shaft 4185 disposed in the rotating shaft bearing seat. The rotating shaft bearing seat is connected to the guide rail assembly through a fixing block 4186. One end of the rotating shaft is provided with a limiting top block 4187. The end of the limiting top block has a concave arc surface 4188.

[0049] The rotating assembly 419 includes an upper pulley assembly 4191, an upper rotating belt 4192 connected to the upper pulley assembly, a lower pulley assembly 4193, and a lower rotating belt 4194 connected to the lower pulley assembly; elastic fixing plates 4195 are respectively provided on the inner sides of the upper and lower rotating belts; the upper and lower pulley assemblies are connected to a rotary motor 4197 via a synchronous belt 4196; the rotary motor 4197 drives the upper and lower rotating belts to rotate synchronously; the upper rotating belt drives the upper shaft to rotate through friction, and the lower rotating belt drives the lower shaft to rotate through friction.

[0050] The clamping and rotating device also includes a feeding rod, which feeds the fruit tray onto the conveyor slide. When the fruit tray is conveyed to the inspection station, the lower clamping carrier rises, and the bearing and limiting block pass through the hollow fruit tray to lift the fruit in the tray. At the same time, the upper clamping carrier descends, using the arc surface of the limiting block to fit against the fruit surface to clamp the fruit tightly without damaging it. Subsequently, the sprocket rotation assembly drives the clamping carrier holding the fruit to be conveyed horizontally forward. When passing the rotating assembly, the belt of the rotating assembly contacts the rotating shaft, and under the action of friction, the belt drives the rotating shaft to rotate, thereby causing the fruit clamped by the rotating shaft to rotate synchronously with the rotating shaft, thus achieving 360° inspection of the side of the fruit. In this embodiment, the upper and lower clamping carriers are driven by the same drive motor; the upper and lower belts are driven by the same rotating motor, thus ensuring good synchronization during operation. Figures 7-8As shown, the automatic fruit internal quality detection device 42 includes an internal detection frame 421, on which an internal detection fruit tray conveyor line 422, a near-infrared light source module 423, and a receiving module 424 are arranged; the near-infrared light source module 423 is mounted above the internal detection fruit tray conveyor line 422, and the near-infrared light source module 423 irradiates the fruit supported by the fruit tray on the internal detection fruit tray conveyor line through the near-infrared light source.

[0051] The fruit tray 10 includes a fruit tray base 101, a base light-shielding ring 102 disposed within the fruit tray base 101, and a fruit tray 103. The fruit tray has a hollow structure, which allows for unobstructed views and facilitates image acquisition of the top and bottom of the fruit by the detection components. The bottom of the fruit tray is connected to the base light-shielding ring, and the top of the fruit tray has multiple claws 104 arranged along the circumference of the edge. The ends of the claws have a downward arc, which allows the claws 104 to better fit the bottom of the fruit without damaging it.

[0052] The near-infrared light source module 423 includes two sets of light sources 4231, which are respectively set on both sides of the internal fruit tray conveyor line via a light source bracket module. The light source is a halogen lamp light source. To protect the fiber optic lens, a light source shield 4232 is provided on the side of the halogen lamp light source. The light source shield is rotatably mounted on a shield rotation cylinder 4233. When no fruit is being detected, the shield rotation cylinder rotates 90°, causing the light source shield to cover the halogen lamp light source.

[0053] Since halogen lamps generate a lot of heat, in order to reduce the temperature of the detection area and prevent the detection effect from being affected by excessive temperature, a heat sink 425 is provided on the outside of the near-infrared light source module 423, and multiple cooling fans 426 are provided on the heat sink.

[0054] The internal inspection fruit tray conveyor line includes two sets of belt drive assemblies 4221, with a 90mm gap between the two sets of belt drive assemblies. The two sets of belt drive assemblies support both sides of the fruit tray for transmission.

[0055] The light source support module includes a horizontal adjustment component 4234, a vertical adjustment component 4235, and an angle adjustment component 4236. The horizontal adjustment component 4234 is mounted on the internal detection frame, the vertical adjustment component 4235 moves on the horizontal adjustment component, the angle adjustment component 4236 is connected to the vertical adjustment component, and the light source is connected to the angle adjustment component. By adjusting the horizontal, vertical, and angle, the device can be adapted to detect fruits of different varieties and sizes.

[0056] The receiving module 424 includes an optical fiber lens 4241, which is connected to the spectrometer via a circuit. The optical fiber lens 4241 is positioned between the two sets of belt drive assemblies 4221 and below the fruit holder 10, receiving light scattered or transmitted through the fruit and transmitting it to the spectrometer.

[0057] The detection principle is as follows: A halogen lamp is used as a near-infrared light source to irradiate the fruit. Some of the light is reflected, some disappears inside the fruit, and the remaining light is scattered or transmitted through the fruit. This scattered or transmitted light carries information about the fruit's internal quality, such as sugar content and black heart disease. This light is received by a spectrometer to obtain the raw spectrum. Then, the raw spectrum is analyzed using chemometric software. Based on a pre-established predictive model, the internal quality information of the fruit can be determined.

[0058] The entire production line is controlled by an electrical control system that controls the operation of each component via circuitry. The entire production process is as follows:

[0059] 1. The feeding mechanism conveys the fruit trays containing fruit to the fruit collection and discharge mechanism;

[0060] 2. The fruit sorting mechanism sorts the disordered fruit trays and then transfers the sorted individual fruit trays to the empty fruit tray / oversized fruit removal mechanism.

[0061] 3. Empty fruit trays / oversized fruit removal mechanism: detects empty fruit trays / oversized fruit, removes empty fruit trays / oversized fruit, and transmits non-empty fruit trays / oversized fruit to the automatic fruit quality detection mechanism.

[0062] 4. An automatic fruit quality inspection mechanism, including an external fruit quality inspection device and an internal fruit quality inspection device. The external fruit quality inspection device inspects the entire surface of the fruit; the internal fruit quality inspection device performs non-destructive testing of the fruit's interior using infrared spectroscopy; the fruit that has undergone external and internal quality inspections is then transported to an automatic sorting mechanism.

[0063] 5. An automatic sorting mechanism, connected to the feeding mechanism, transports the inspected fruits to the corresponding feeding channels;

[0064] 6. Feeding mechanism, including multiple feeding channels of different levels, for manual feeding of the inspected fruits;

[0065] 7. Empty fruit tray return mechanism, which is connected to the empty fruit tray / oversized fruit rejection mechanism and the unloading mechanism respectively, to transfer the empty fruit tray to the loading mechanism;

[0066] 8. Packing and unloading mechanism: packs and unloads graded fruits.

[0067] The above description is only a specific embodiment of the present invention. Various examples and illustrations do not constitute a limitation on the substantive content of the present invention. Those skilled in the art can make modifications or variations to the above-described specific embodiments after reading the specification without departing from the substance and scope of the invention.

Claims

1. An automatic fruit sorting production line, characterized in that: It includes a feeding mechanism, a fruit confluence and discharge mechanism, an empty fruit tray / oversized fruit rejection mechanism, an automatic fruit quality detection mechanism, an automatic sorting mechanism, a feeding mechanism, an empty fruit tray return mechanism, a boxing and confluence feeding mechanism, an electrical control mechanism, and a conveyor line connecting the above mechanisms; The feeding mechanism conveys the fruit trays containing fruit to the fruit collection and discharge mechanism; The fruit sorting mechanism sorts the disordered fruit trays and then transfers the sorted individual fruit trays to the empty fruit tray / over-limit fruit removal mechanism. The empty fruit tray / oversized fruit rejection mechanism detects empty fruit trays / oversized fruits, rejects them, and transmits non-empty fruit trays / oversized fruits to the automatic fruit quality detection mechanism. An automatic fruit quality inspection mechanism includes an external fruit quality inspection device and an internal fruit quality inspection device. The external fruit quality inspection device inspects the entire surface of the fruit; the internal fruit quality inspection device performs non-destructive testing on the inside of the fruit using infrared spectroscopy; the fruit that has passed both external and internal quality inspections is then transported to an automatic sorting mechanism. The aforementioned fruit external quality inspection device includes a clamping and rotating device, a side inspection mechanism, an upper surface inspection mechanism, and a lower surface inspection mechanism. The fruit is placed in a fruit tray and transported by an external inspection conveyor line to a weighing mechanism for weighing. The clamping and rotating device lifts and clamps the fruit in the tray and rotates it during horizontal transport. During rotation, the side inspection mechanism performs a 360° side inspection of the fruit. After the upper and lower surface inspection mechanisms inspect the upper and lower surfaces of the fruit respectively, the fruit internal quality inspection device uses near-infrared irradiation to inspect the internal quality of the fruit. The clamping and rotating device includes a clamping assembly and a rotating assembly. The clamping assemblies are respectively positioned above and below the conveyor line. Each clamping assembly includes a sprocket rotation assembly and a clamping carrier that is raised and lowered on the sprocket rotation assembly via a guide rail assembly. The lower clamping carrier pushes the fruit out of the fruit tray while the upper clamping carrier descends to cooperate with the lower clamping carrier to clamp and transport the fruit. When passing through the rotating assembly, the rotating assembly drives the upper and lower clamping carriers to rotate synchronously through friction, realizing the rotation of the clamping carrier during the transport process. The clamping carrier includes a rotating shaft bearing seat and a rotating shaft disposed within the rotating shaft bearing seat. The rotating shaft bearing seat is connected to the guide rail assembly via a fixing block. One end of the rotating shaft is provided with a limiting top block. The end of the limiting top block has a concave arc surface. The fruit tray includes a fruit tray base, a base light-shielding ring disposed within the fruit tray base, and a fruit tray; the fruit tray has a hollow structure. The fruit internal quality testing device includes an internal testing frame, on which are mounted an internal testing fruit tray conveyor line, a near-infrared light source module, and a receiving module. The near-infrared light source module is mounted above the internal testing fruit tray conveyor line and illuminates the fruit supported by the fruit trays on the conveyor line using near-infrared light. The receiving module is located below the internal testing fruit tray conveyor line and is connected to a spectrometer. The receiving module receives light scattered or transmitted through the fruit and transmits it to the spectrometer. An automatic sorting mechanism, connected to a feeding mechanism, transports the inspected fruits to the corresponding feeding channels. The feeding mechanism includes multiple feeding channels of different levels, which are used to manually feed the inspected fruits; The empty fruit tray return mechanism is connected to the empty fruit tray / oversized fruit rejection mechanism and the unloading mechanism, respectively, and transmits the empty fruit tray to the loading mechanism; The boxing and feeding mechanism is used to box and feed the graded fruits. The electrical control mechanism controls the operation of each component through circuitry.

2. The automatic fruit sorting production line as described in claim 1, characterized in that: The bottom of the fruit tray is connected to the light-shielding ring of the base, and the top of the fruit tray is provided with multiple claws along the circumference of the edge, with the ends of the claws having a downward arc.

3. The automatic fruit sorting production line as described in claim 1, characterized in that: The rotating assembly includes an upper pulley assembly, an upper rotating belt connected to the upper pulley assembly, a lower pulley assembly, and a lower rotating belt connected to the lower pulley assembly; elastic fixing plates are respectively provided on the inner sides of the upper and lower rotating belts; the upper and lower pulley assemblies are connected to a rotary motor via a synchronous belt; the rotary motor drives the upper and lower rotating belts to rotate synchronously; the upper rotating belt drives the upper shaft to rotate through friction, and the lower rotating belt drives the lower shaft to rotate through friction.

4. The automatic fruit sorting production line as described in claim 1, characterized in that: The near-infrared light source module includes two sets of light sources, which are respectively set on both sides of the internal detection fruit tray conveyor line through a light source bracket module; the light source is a halogen lamp light source, and a light source shield is provided on the side of the halogen lamp light source, which is rotatably mounted on a shield rotating cylinder.

5. The automatic fruit sorting production line as described in claim 4, characterized in that: The light source support module includes a horizontal adjustment component, a vertical adjustment component, and an angle adjustment component; the horizontal adjustment component is mounted on the internal detection frame, the vertical adjustment component moves on the horizontal adjustment component, the angle adjustment component is connected to the vertical adjustment component, and the light source is connected to the angle adjustment component.

6. The automatic fruit sorting production line as described in claim 1, characterized in that: The internal detection fruit tray conveyor line includes two sets of belt drive assemblies with a gap between them. The two sets of belt drive assemblies support both sides of the fruit tray for transmission. The receiving module includes an optical fiber lens, which is connected to a spectrometer via a circuit. The optical fiber lens is positioned in the gap between the two sets of belt drive assemblies and is located below the fruit tray.

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